There is a large amount of pros and cons for both, a Schrader valve can hold in excess of 250psi, They use them in air conditioning and pressure vessel tanks where you have to use a compressor to pump air in them over liquid . No need for WWIII over a valve I think you better read this extract

Whereas Schrader valves are almost universal on car tyres, bicycle tubes have Dunlop, Schrader or Presta valves. Both the Schrader and the Presta types are good at sealing high pressures. Their chief differences are that Schrader valves are larger and have springs that close the valve except when the pin is depressed. Schrader valves are used in a wide variety of compressed gas and pressurized liquid applications.

Presta valve stems are 6mm diameter, whereas Schrader valve stems for bicycle tyres are 8mm, thus requiring a larger diameter hole in a bicycle rim. While not a concern on wider bike rims, it will weaken a narrow wheel rim, precluding their use on (road) racing bicycles. Another disadvantage of the Schrader is that the air chuck must depress the spring-loaded pin before air can flow during inflation, whereas the Presta valve relies solely on internal air pressure to keep it shut. This means that some air is lost while attaching and detaching pumps to Schrader valves, although this is usually nominal (most of the air which makes the "whooshing" noise when the pump is removed comes from the compressed air in the tube between the pump body and the attachment end, not the tyre via the momentarily-open Schrader valve). To fill up a bicycle tyre with a Presta-valved tube at a gas station requires an adaptor, while a Schrader-valved tube does not.

I beg to differ on the "presta valves hold air better" claim. If the nut on the tip is done up properly, the air retention is about the same. If the nut is not snugged down, air escape is most definitely more rapid than from a Schraeder valve.

Schrader valves on MTB shocks hold air just fine. I hardly ever have to add air to my forks or rear shock and they are set at around 150psi. I put air in tyres at least monthly while the shocks often get to six months. It's the rubber in the tube that lets out most.

bychosis (bahy-koh-sis): A mental disorder of delusions indicating impaired contact with a reality of no bicycles.

Just as life deals out unfairness it would be the very day you win to be a saddle that my fat butt is parked on it......................

LOL! I suppose being a nice guy that I am I could put up with a Turkey slap or two as long as you don't fart and if you do fart, I would split in two and spike your butt that hard you would have to throw me away. As a reward I get two days with the young honey thou

Just as life deals out unfairness it would be the very day you win to be a saddle that my fat butt is parked on it......................

LOL! I suppose being a nice guy that I am I could put up with a Turkey slap or two as long as you don't fart and if you do fart, I would split in two and spike your butt that hard you would have to throw me away. As a reward I get two days with the young honey thou

ive just noticed my MTB rim only takes Presta as the schrader is too wide.

i dont think drilling it out a bit wider with a drill bit to suit a schader is a good idea.

now im limited to choices?

Might depend on the rim manufacturer but I have confirmation from Pro-Lite that you can drill out the MTB rims without effect on the warranty. I presume this would be acceptable with most other brands as well but maybe you should check with your wheel manufacturer first.

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